Fig. 3

ROC curve analysis of TB Ag-NL levels in pediatric SLE. (A) The area under the ROC curve (AUC) of TB Ag-NL, C3, C4, ANA and Anti-dsDNA are shown in corresponded colors. (B) The ROC curve and AUC value of TB Ag-NL with the duration of SLE disease. Different colors show the corresponded years at duration of SLE.